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Aeroqual Series 900 User Guide
1. Description
The Aeroqual Series 930 Fixed Gas Monitor is designed to measure and control gas concentrations
and to communicate to a variety of hardware systems.
The monitor can operate as a relay controller with user controlled set points, a 4-20 mA gas
transmitter as well as communicate via RS485 on a network. They can also connect to PC data
logging and networking software to allow for real-time network capability to be set up and logged data
to be stored. The software can be found at our website
1.1. S930 Components
The following components are supplied with the S930 Fixed Gas Monitor:
Series 930 base unit
Temperature and Relative Humidity Sensor (Optional)
Integrated display (Optional)
Strobe & Siren (Optional)
RS485 to USB converter for PC configuration (Optional)
Please check that all these components have been supplied and contact your distributor or Aeroqual
at
if any of the components are missing.
Replacement sensor heads and other accessories can be purchased separately.
Note: All sensor heads deteriorate over time. We recommend recalibration once a year and
replacement every two years or when the “sensor aging” or “sensor failure” diagnostics
appear. Sensors require more frequent maintenance if run continuously at site.
1.2. Components not supplied but required
24VDC 1A power supply for powering the Series 930
2. Configuration
The Series 930 alarm and 4-20mA output scale settings can be configured via the Fixed Monitor
Configuration software. The PC software can be found on our website at
To configure the instruments by computer you will need an RS232/RS485 or USB/RS485 converter.
There are many RS232/RS485 converters available on the market however only certain brands will
function well with the Aeroqual products. Aeroqual can supply a USB/RS485 converter suitable for
configuring the instruments. Please contact your account manager for more information or contact
2.1. Using the Aeroqual USB to RS485 converter
The USB-RS485 converter cable provides a USB to RS485 serial interface with customised end
connectors. The drivers required can be downloaded for free from
Note:
Aeroqual S930 monitors communicate via 2 wire RS485 so the
converter must be configured to RS485 2W.
USB to RS485 wiring
S930 Output
GND (Black)
GND
Data+ (A) (Orange)
RS485A
Data- (B) (Yellow)
RS485B